Das Verschwundene Marzipanrezept [The Missing Marzipan Recipe] [Outdoor]

Lübeck without marzipan potatoes? Inconceivably! But an accident has happened: all the recipes for making marzipan potatoes have disappeared, so far unnoticed by the public. Since every effort has been made to keep the recipes secret, there are no copies of them. Lübeck's marzipan manufacturers are at a loss. They still have some marzipan potatoes in stock. But then what? No more marzipan potatoes in Lübeck? Can you retrieve the secret marzipan potato recipe?